Thermostatic control device



May 24, 1927. 1,629,757

E. WILSON THERMOSTATIC CONTROL DEVICE Filed Dec. 17, 1924 F 1 5 l F5. EX? 5 M if 2 Patented May 24, 1927.

UNITED STATES PATENT OFFICE.

THERMOSTATIC CONTROL DEVICE. I Application filed December 17, 1924.Serial No. 758,486.

This invention relates to thermostatic contric circuit is closed;andgwhen said contents I trol devices for use in controlling the operareat the opposite end of said container the ation of electric and othermachines. circuit is open. The present invention com- An object of theinvention is to provide prises means for supporting the container so 5an improved thermostatic controlling device that it will be operatedunder the influence including a switch of the mercury type, of athermostatic actuator to cause the mer- 60 means for supportin theswitch in a manner cury contents to flow from one end of the in which itis movab e to and from open and container to the other end thereof toopen closed positions, and an actuator of an imand to close the circuit,1 proved quick-acting type for operating the The container 10 issupported in a clip switch as an incident to the variation of thecomprising apair of spring arms 11 embrac- ()5 temperature beyondpredetermined desired g he contalner between them, an extension li it I12 from said clip having laterally extended Another object of theinvention is to proarms 13 termlnating at their under edges in vide animproved thermostatic controlling a tenuated or knife edges 14. Theattenudevice comprising a switch and an actuator ated edges 14 0f thearms 13 PlVOl; ill the 70, therefor possessing the novel characteristicslower corners of heallhg p g 15 ill the and advantageous mode ofoperation herem 1 of a bracket. An arcuate resili ft di l i rent arm 1 7has one end attached to the wall 0 Another object of the invention is topro- 0f t ng 1 and supports the bracket of vide a device of thecharacter mentioned and Whlch the 3111,1316 are a P F A d 75 includingmeans for regulating and varying u e 8, contamlng a quantity of volati eli the relationship of the parts so that the and F Vapor, the Pressureof ll switch will be operated at selected variable changespwlth h chhhgeof temperature, is temperatures, p t eld 1n connect-ion with the arm 17curving I other objects appear from the follow- 1n (Bonfol'nllt3 Wit/ harm 8o ing description, reference being made to the the actuator tehdmgto Straighten the arm drawing, in which i Fig. 1 is a front elevation ofthedevice ions of the tube 18 m be elthel' spiral i h th cover l t th rf removed. shown, or of other form. The free end of Fig 2 i a verticalSectional View 1 the arm 17 is connected with athermostatic 85 Fig. 3 isan enlarged detailed view of imregulatmg member 9- it a 0011 P ihgportant features of the invention.

Fi 4 i a d elevation f the Switch part 21 in connect on therewith andaccesmemfier d h d f the other pal-ta sible'from the outside, so thatsaid member In the embodiment of the invention shown may be moved todlfilelellt adjusted posi- /90 the operative devices are .confinedwithin an tlons to control the opelfltlon f the arm enclosing casing 1having an open end closed 17 by the actuator 18 at Selected degrees by aglass plate 2 held in place by a ring 3. of temperature- A deteht 22 PPted y The electric circuit wires 4 and 5 lead the P 21 has latchingengagement/With from binding ts 6 and 7 and have their teeth ofsegmental Plate 23 having 95,

terminals 8 an 9 extending intoan angular degrees of temperatureIndicated h r on to or curved glass container 10 near one end gulde theuse! of the device in setting it th r f, Th glass container 10 d it thatthe device will operate the switch in 45 cur contents for the purpose ofopening conformity with the requirements. A link an closing the electriccircuit are of famil- 24 has its outer end pivoted tothe free, end iarcommercial type and do not require an of the arm 17 and its inner endsup rted tended description. However, their associafrom one of thebracket arms 16. pair tion with and relationship to the remaining of'ears 26 in connection withthe link 24 sub'ect matter of the inventionare new and have threaded holes therethrough in each of use For thepresent purposes it is sufliwhich a regulating screw 27 is operativelycient to mention that when the mercury conmo inted. The arm 12 extendsbetween the tents of the container 10 are at the end into ends of thescrews 27 and lcaf springs 28 which the terminals 8 and 9 extend theelechave their upper ends attaclied to the arm 12 and their lower endsdiverging at opposite sides of said arm. As the temperature affects theactuator 18 the link 24 is operated causing one or the other of theabutment screws 27 to contact with the cooperative spring 28 and movethe switch device 10 to position to open or to close the circuit,depending upon the direction of movement of the link 24.

The abutment screws 27 may be adjusted to increase or reduce extent ofmovement of the actuator required to operate the switch. The abutmentscrews 27 bear a certain relationship to the thermostatic scale on theplate 2; and an adjustmentonee obtained need never be varied unless itis desired to vary the conditions under which the device will operate.

The mercury switch element may obviously be mounted with the electricterminal contact members 8 and 9 at either side of the pivot, thusproviding that the circuit will be closed by increase of tempera ture inthe mounting shown (Fig. 1); and providing that the circuit will beclosed with decrease of temperature by reversing the switch to aposition in which the terminal members 8 and 9 are at the opposite sideof the pivot, and vice versa.

The actuator 18 may also be controlled by variation in temperatureapplied to the inside of the actuator through an inlet passage 29.

It is clear that my invention obtains all of its intended objects andpurposes in an efiicient and satisfactory manner, may be economicallymanufactured and sold and is not subject to much wear when in use.

What I claim and desire to secure by Lettors Patent is:

1. A thermostatic control device comprising an element to be actuated, acurved resilient arm, connections from said arm for actuating saidelement, and a corrugated tubular actuator mounted within the curvatureof and attached to said arm.

2. A thermostatic control device comprising an element to be actuated, acurved arm, connections for actuating said element by said arm, acorrugated tubular actuator curving with and attached to said arm, and apipe opening into one end of said actuator.

3. A thermostatic control device comprising an element to be actuated, acurved arm tapering from maximum thickness at one end toward the otherend, a tubular actuator mounted within the curvature of and attached tosaid arm and being responsive to variation in temperature, andconnections for actuating said element by said arm.

4. A thermostatic control device comprising an element to be actuated, acurved arm tapering from maximum thickness at one end toward the otherend, a tubular actuator mounted within the curvature of and attached tosaid arm and being responsive to variation in temperature, connectionsfor actuating said element by said arm, and means for moving said arm toits starting point from which it is moved by said actuator.

5. A thermostatic control device comprising an element to be actuated, acurved arm tapering from maximum thickness at one end toward the otherend, a tubular actuator mounted within the curvature of and attached tosaid arm and being responsive to variation in temperature, connectionsfor actuating said element by said arm, and a device settable toincrease or reduce the amount of energy by which said element will bemoved by said arm and said actuator.

6. A thermostatic control device comprising a curved arm of increasingthickness from a point near one end to a point near the opposite. end, acorrugated tubular actuator responsive to variation in temperaturemounted within the curvature of and engaging said arm, an inlet passageopening into one end of said actuator, and a spring resisting movementof said arm by said actuator.

7. Athermostatic control device comprising a curved arm, a corrugatedtubular actuator mounted within the curvature of and attached to saidarm, an element to be actuated, means for actuating said element by saidarm, and means for controlling. said arm whereby said arm will beoperated at a predetermined temperature.

8. A thermostatic control device comprising a curved arm, a corrugatedtubular actuator mounted within the curvature of and attached to saidarm, an element to be actuated, means for actuating said elementby saidarm, and means for controlling and indicating the temperature at whichsaid arm will be actuated by said actuator.

EDWARD WILSON.

